Jon, Thanks for yours and everyone else's efforts here. Comments below. -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Jon Page Sent: Friday, November 16, 2007 8:19 AM To: pianotech at ptg.org Subject: Steinway action noise Looking at my parts, there is a Hamburg flange with the drop screw about 2 mm proximally located. In your photo, the red leaching of the dye into the shank around the bushing says Renner. My NY S&S shanks have a bushing with a white center not all red. Some Renner flanges (if I'm not mistaken) have the center about 1 mm more distal. OK, Renner then. It still seems that 1-2 mm is not going to be enough to get this rep lever at a normal contact point with the drop screw. In fact I just now verified that by adding 3 thicknesses of our normal traveling paper i.e. that pregummed craft paper stuff. I might make a regulation more possible but it did nothing to move the drop screw more to the correct contact area. The Magic Line is measured with the key set at half-blow not half dip. Half blow is about 1/3 dip and is also the time that the damper engages. The easiest way to measure it is to insert a screw driver blade under the rear of the key until the hammer reaches half-blow. The sample I just did shows the magic line to be roughly ok on the one key I tried. I'll have to check more. The key end lifter felt height should be about 1 3/8" at rest. If someone replaced the back rail felt and didn't install underfelt then they would have to increase the felt height to time the dampers without drastically lowering the underlevers on the wires (or off them). The back rail felt is original and in fairly good shape. It is a thick green felt cloth and when peeled back reveals a thinner red felt centered under the green. The bottom felt measures 1 13/32 at rest and the top (double) felt measures 1 5/8". No access to the dampers right now. I'll have to go back there. Check the underlever flange center height while you're at it. The key lifts the underlever to ~1 3/4". Lift one to that height and see if it is parallel to the keybed. I say it should lift to parallel, anything short of that and there is too much sliding friction on the felt and usually causes digging of a trench because the underlevers and at too steep of a downward angle. Lifting beyond parallel is not efficient motion either. There is less scrubbing friction when lifted to parallel. I have only the action in the shop right now. I'll have to make arrangements to get back to the school and check this out. Regards, Jon Page Sorry to all. I'm kinda taking straifing runs at this. I'll try for better this weekend after the Sabbath. Best, Greg
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